android: SlidingDrawer 抽屜效果 (Gesture View Like Facebook Notification)

要是實現這樣的功能很簡單，就是SlidingDrawer的使用

效果如下圖：手指按住Notification往上/往下拉動，顯示/隱藏notification content

XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:gravity="bottom">
    <SlidingDrawer android:layout_width="wrap_content"
        android:id="@+id/SlidingDrawer" android:handle="@+id/slideHandleButton"
        android:content="@+id/contentLayout" android:padding="10dip"
        android:layout_height="200dip">
        <Button android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:id="@+id/slideHandleButton"
            android:background="@drawable/arrowup"></Button>
        <LinearLayout android:layout_width="wrap_content"
            android:id="@+id/contentLayout" android:orientation="vertical"
            android:gravity="center|top" android:padding="10dip"
            android:background="#505050" android:layout_height="wrap_content">
            <TextView android:id="@+id/TextView01" android:layout_width="wrap_content"
                android:layout_height="fill_parent" android:layout_weight="8" android:text="Hello Slider"></TextView>
            <Button android:id="@+id/Button02" android:layout_weight="2" android:layout_width="wrap_content"
                android:layout_height="wrap_content" android:text="Do anything"></Button>
        </LinearLayout>
    </SlidingDrawer>
</LinearLayout>

activity

public class SliderActivity extends Activity {
    Button slideHandleButton;
    SlidingDrawer slidingDrawer;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);
        slideHandleButton = (Button) findViewById(R.id.slideHandleButton);
        slidingDrawer = (SlidingDrawer) findViewById(R.id.SlidingDrawer);

        slidingDrawer.setOnDrawerOpenListener(new OnDrawerOpenListener() {
            @Override
            public void onDrawerOpened() {
                slideHandleButton.setBackgroundResource(R.drawable.arrowdown);
            }
        });

        slidingDrawer.setOnDrawerCloseListener(new OnDrawerCloseListener() {
            @Override
            public void onDrawerClosed() {
                slideHandleButton.setBackgroundResource(R.drawable.arrowup);
            }
        });
    }
}

不用講解，layout.xml和java代碼很清晰。